IDT2309B-1HDCG

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Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

IDT2309B-1HDCG is a clock generator, phase locked loop (PLL), and frequency synthesizer integrated circuit (IC). Its main purpose is to provide a selectable, fixed-frequency clock output for any desired digital system. The IC provides the user a wide range of input frequencies, selectable clock outputs and power management features. The limits of the various features are explained in the datasheet.

The IDT2309B-1HDCG clock generator is especially well-suited for applications in high-speed, digital and mixed-signal systems. It includes a digital clock generator, PLL, and different frequency synthesizer, enabling the user to generate any desired clock frequency on-demand. The IDT2309B-1HDCG works as a voltage-controlled oscillator (VCO), dividing the input frequency by a fixed division ratio. The output frequency selection and power management features can be programmed via its serial interface.

The IDT2309B-1HDCG is widely used in many large scale and small scale operations. It is suitable for use in commercial electronic components, such as cell phones, PDAs, digital audio players and DVD players. It is also used in many industrial applications, such as factory automation and industrial robotics. In addition, it is popular in medical imaging systems, machine vision systems and high-end graphics applications.

The working principle of the IDT2309B-1HDCG is based on a phase locked loop (PLL) circuit design. The IDT2309B-1HDCG\'s basic function is to compare the frequency of an input signal to the output frequency of a VCO and adjust the division ratio so that the output frequency matches the input frequency. When the input frequency and the output frequency are equal, the PLL is said to be "locked".

In a digital PLL (DPLL), the VCO frequency is swept over a range of input frequencies. When the input frequency is equal to the reference frequency, the PLL is "locked". In the IDT2309B-1HDCG, there is a selector switch to choose either the onboard frequency or an external reference frequency as the reference frequency. Once locked, the PLL divides the reference frequency by a programmed division ratio to produce the desired output frequency.

The IDT2309B-1HDCG has many features that make it easy to integrate into a system. It has a programmable low noise divider to control the jitter of the output clock signal. Output voltage levels are adjustable and the phase output can be linked to an input signal. The IC also has a power management feature that allows the output frequency or power consumption to be adjusted depending on the application.

In summary, the IDT2309B-1HDCG is an extremely versatile clock generator, PLL and frequency synthesizer used in many digital systems. The integrated circuit has a number of features that make it easy to integrate into a system, including programmable output divisions, adjustable voltage levels and power management. The DPLL uses an external reference frequency or onboard frequency as its reference signal, enabling the user to select any desired output frequency.

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